Is it that you often play computer games ________ worries your parents?

A．why

B．that

C．which

D．what

男，40岁。烧伤面积50％，Ⅲ度。经抗休克抗感染等治疗后，一般情况尚可，但发现有黑便，量约400ml，既往无溃疡病史。考虑患者并发了（）

A.胃癌

B.门静脉高压症

C.胆道出血

D.十二指肠球部溃疡

E.Curling溃疡